Boring and reaming tool



c. F. HEINKEL' BORING AND REAMING TOOL;

APPLlCATlON FILED NOV. 4,1915. I 1,337,015. I Patented Apr. 13, 1920.

2 SHEETS-SHEET 1.

\J GM 57 4 5 MWEESES:

\ Q y X (M '6 I C. F. HEINKEL.

some AND REAMING TOOL.

' \APPLICATION FILED NOV. 4,1915. 1,337,01 5, Patented Apr. 13, 1920.

2 SHEETSSHEET Z.

IX; Fig. XII is an. end

UNITED STATES PATENT OFFICE.

CHRISTIAN r. HEINKEL, 0F CLEVELAND, OHIO.

roams Ami REAMING TOOL.

To all whom it may concern:

illustrated in the drawing in whichFigure 15 I 1s a general side view ofa boring and reaming tool partly broken away to show the relation of thepilot cutter to the finishing cutter; Fig. II is an end view of Fig. Ipartly broken away to show a method of adjusting the cutter blades; Fig.III is a general side view of 7 tool having a pilot cutter and a roundand adjustable finishing pilot and finishing cutters and a method ofadjusting the finishing cutter and locking the pilot cutter; Fig. IV isan end view of Fig. III; Fig. V is a side view of Fig. III partly brokenaway to show the relation of the cutters; Fig. VI is a side view of ausual shell reamer With a pilot cutter; Fig. VII-is a side View of thepilot cutter shown in...Fig. VI; Fig.. VIII Fig. VI; Fig. IX is a sideview of a boring and reaming tool having two finishing cutters; Fig. Xis an endview of Fig. IX; Fig. XI is a top view of Fig. view of a boringand reaming tool having a pilot cutter and four round finishing cutters;Fig. XIII is a top view of Fig. XII; and Fig. XIV is a side View of XII.

Similar reference characters refer to similar parts throughout theseveral views.

Referring now particularly to Figs. I and II. In this tool, 'the body 34has the slot 35 into which the finishing cutter 36 fits slidingly.Thisbody 34 also has an opening to receive the screw 37 as shown andalso has an opening 38 into which the pilot cutter 39 fits rathersnugly. In the end of body 34 are tapped openings to receive the pointedset screws 40 which accomplish the double purpose of holding the pilotcutter in place as well as preventing the frontand divided end of thebody 34 Specification of Letters Patent. Application filed November 4,1915. Serial a boring and reaming cutter and being partly broken away toshow relation between the is an end view of a pilot cutter and PatentedApr. 13, 1920. No. 59,558

from spreading. The slot 35, in this instance, being cut in the end ofthe body 34; the body is therefore open at the front end thereof. i v

The finishing cutter 36 has the opening 7 which registers with thecoi'responding opening in the body 34 but is somewhat larger in diameterthan screw 37 to permit the finishing cutter 36 to float on the screw 4.The face 8 of the cutter 36 should line up bottom of the slot in thebody 34 so that the cutter 36 may have a the notch 41, preferably,touches the cutter 39 lightly while the two beveled faces 11 avesomeclearance over the cutter 39 so movement. This radial movement ofthe cutter 36 constitutes the float of the cutter and the distance orspace between the circumferential surface of the pilot cutter and thefaces 11 determines the amount of the float on each side of thelongitudinalaxis of the tool. The opening 7 in the cutter 36 may,conveniently, be sized so that the space screw 37 equals the spacebetween the pilot cutter and the faces 11 previously set forth, althoughthis opening be larger than specified without interfering with thefloating of the cutter. The cutter 36 floats between the faces 8 and 11and the screw 37 performs no particular function as to floating of thecutter, but is provided as a safe uard to keep the cutter in the bar aswhen the pilot cutter is out of the bar for instance.

In the particular construction shown, the finishing cutter 36is'provided with the cutting blades 42 which are secured to the cutter36 by the screws 43. These blades 42 have the beveled faces 44 whichserve to hold the blades 42 more firmly to the cutter 36. as well as toprovide better facilit for holdingthe packing material whiclimay beplaced thereon when adjusting the same.

vThe blades 42 are here shown adjustable. Such adjustment beingaccomplished by packing out or in other words, by placing a layer ofpaper or other material on the beveled faces 44 between the blades 42squarely with the the body of the and the cutter 36 whereby the blade 42will be moved outwardly or adjusted to required size. In order to permitthe blades 42 to move outwardly as stated, the holes forthe screws 43 inthe blades 42 should be elongated as shown. 3y providingthese blades 42,the cutter 36 may be made of cheaper material and the blades. 42 arerenscrews 40 whereby the pilotcutter 39 is rigidly held in position.

The several members of this tool are properly machined, hardened andground where found necessary or convenient or advantageous.

It will be seen that this tool is economical of manufacture since it hasfew parts and no exact or close or time consuming fitting is necessarythereon and that this tool is efficient since the roughing and finishingis done in one operation whereby considerable time is saved inproduction of work. The pilot cutter, being rigidly secured to the body,trues up the opening to be finished while the finishing cutter, beingfloatingly mounted, finishes and sizes the opening immediately after theroughing and without change of tools or stoppage of machinery or otherinconveniences or time consuming 'operations.

Referring now particularly to Figs. III, IV, and V.

In this tool, the body 45 has the opening 46 into which the round cutter47 fits slidingly and also has the opening 48 into which the pilotcutter 49 fits snugly and also has the opening.50 in its end to receivethe screw 51 which holds the pilot cutter 49 in place.

This finishing cutter 47 has the notch 52 which bears the same relationto the pilot cutter 49 as the notch 41 bears to the pilot cutter 39 inFigs. I and II previously described but the notch 52 may also be formedso that the pilot cutter 49 will fit therein snugly when it isdesired tohold the finishing cutter rigidly as shown in Figs. XIII and XIV forinstance.

The finishing cutter 47 carries the cutter blades 53 which are securedthereto by the screws 54.

An adjusting means for the cutter blades 53 is here provided whichconsists of the pointed adjusting screw 55 located in the cutter 47 andthe adjusting rods 56 located in the central opening in the cutter 47.

In this tool, as shown, the finishing cutter floats while the pilotcutter is held rigidly.

Adjustment of the cutter blades 53 is accomplished by turning the screw55, the pointed end of which bears against the beveled ends of theadjusting rods 56 and forces the cutter blades 53 out as the screw ismanipulated. This method of adjusting the cutter blades may also beemployed on other types of cutters.

Referring now particularly to Figs. VI, VII, and VIII. In this tool, theshank 57 has its end reduced diametrically to receive the reamer 58either floatingly or rigidly. This reduced part has a slot near its endinto which the pilot cutter 59 fits snugly and also has'a threadedopening in its end to receive the screw 60 which holds the pilot cutter59 in place.

The reamer 58 has the slot 61 in its front end for the purpose ofallowing'the pilot cutter 59' to pass through and being located so thatthe cutting edge of the pilot cutter is only a short distance ahead ofthe cutting edge of the finishing cutter or reamer 58.

The pilot cutter 59, in this instance, has the cutting faces X and Y;the face X being slightly ahead of the face Y and being adapted to borea hole somewhat smaller than the face Y while this. face Y in turn isadapted to bore the hole somewhat smaller than the reamer 58. The objectbeing to have the face X remove all surplus material and irregularitiesin the hole to be bored while the face Y sizes and trues up the holeafter the face X so that the reamer 58 needs to finally size and smooththe hole only.

In this tool, the reamer may'fioat by turning the reduced part of theshank 57 somewhat smaller than the bore of the-reamer;

or it may be held rigidly by fitting this reduced part snugly to thereamer bore.

The pilot cutter shown here serves the double purpose of a cutter and ameans for driving the reamer near the front and cutting end.

heferring now particularly to Figs. IX, X, and XI. In this tool, thebody 62 has openings into which the finishing cutters 63 and 64 fitslidingly. and also has an opening into which the pilot cutter 65 fitssnugly, and also has an opening in its end to receive the screw 66 whichholds the pilot cutter 65 in place, and also has openings to receive thescrews 67 and 68 the purpose of which will appear later.

The finishing cutters 63 and 64 have openings 69 and 70, respectively,which are some what larger than the diameter of the screws 67 and 68,and also have the notches 71 and 72, respectively. The notch 71 being arranged and serving the same purpose as the notch 41 in Figs. I, II, andIII previously described, while the notch-72 is somewhat wider than thethickness of the finishing cutter 63 and sufficiently deep to permit thecutter 63 to slide endwise on the cutter 64 so that the cutter 63 mayfloat on the pilot cutter 65 and the screw 67 without much end playlongitudinally of the body while the cutter 64 may fioat on the cutter63 and the screw 68 likewise without much end The screws 67 and 68assist in holding the cutters 63 and 64 in place similar to the screw 37Figs. I and II.

pointed screws 73 and by providing conical openings in the cutters 63and 64 to receive the points of the screws 73 so that either one.

or both of the cutters 63 and 64 may be held firmly and centrally whenthe screws 73 are tightened.-

In order to produce a better hole than the usual two face cuttersproduce, each outer face of the cutters 63 and 64 is provided with twocutting teeth, which plurality of cutting teeth also tends to prolongthe life and cutting capacity of the tool.

In the tool shown here, the finishing cutters may be used eitherfioatingly or rigidly and centrally.

Referring now particularly to Figs. XII, XIII, and XIV. In this'tool,the bar 74 has a series of round openings, preferably at right angleswith each other as shown, into which the round finishing cutters 75, 76,7 7, and 78 fit slidingly, and also has the opening 79 into which thepilot cutter 80 fits snugly, and also has an opening in end to receivethe screw 81 which holds the pilot cutter 80 in place, and also has anopening for the screw 82 which assists to hold the cutter 78 in place aspreviously described.

In this instance, the sides of the notches in the cutters are arrangedto fit snugly over the adjacent cutters and screw and the cutters areall held rigidly and centrally; they may however be arranged as shown inFigs. III, IV, and V. provided to hold the cutters more firmly than thenotches when so desired, or to hold one or more of them firmly when theyare otherwise mounted floatingly. Without considering the screws 83, thecutter is held in place by the pilot cutter and the cutter 76, the.cutter 76 is held by the cutter 77, the cutter 77 is held by the cutter78, and

the cutter 78 is held by the screw 82.

play.

The pointed screws 83 are Each end of the finishin here has a pluralityof cut ing teeth which tends to prolong the life of the tool andproduces a better hole and does so quicker than a single cutting edge.

It will be seen that this particular construction provides acomparatively inexpensive tool which is eificient in action andmaintenance. The plurality of finishing cutters provided here produce abetter and more round hole than a single cutting edge at each end coulddo and this plurality of teeth serves the further purpose of increasingthe efficiency of the tool to maintain its size longer than the usualtwo edge tool.

It is thought that the practical applications of the. present inventionas shown and described will enable others to apply this invention toother forms of tools and in other combinations of elements I claim:

1. A tool of the character described comprising a body, a pilot cutterheld against movement in said body, and a finishing cutter floatinglyheld in said body by said pilot cutter.

2. A tool of the character described comprising a body, a pilot cutterheld against movement in said body, a finishing cutter floatingly heldin said body by said pilot cutter, and means for rigidly holding saidfinisdhing cutter in said body when so desire 3-1%. tool of thecharacter described comprising a body, a pilot cutter held againstmovement in said body, a plurality of finishingcutters held one by theother in said body, the first of said finishing cutters held in saidbody by said pilot cutter.

4. A. tool of the character described comcutters shown prosing a shank,a pilot cutter held against 1 movement in said shank, and a finishingcutter held on said shank by said pilot cutter and driven thereby at thefront end thereof.

5. A tool of the prising a. body which is divided at its front end, apilot cutter held against movement in said body, the said front anddivided end of said body held in position by said pilot cutter and itsholding means, and a finishing cutter floatingly held in said body bysaid pilot cutter.

CHRISTIAN F. HEINKEL.

Witnesses:

JOHN KALsoH, @scan I DEAN.

character described comby being able

